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Tool Talk Discussion Forum

Compressor size and power?

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Mike CA

11-14-2006 08:35:42




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I want to get a compressor for my shop so I can restore my Farmall. I want to properly run tools, use it as a blow-out vent, and to run a spray gun.

What is the minimum size tank I should get? What about horsepower for the engine?




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jeffcat

11-15-2006 16:09:34




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
Another little tip. NEVER OILESS! That is the first thing but also listen to it run. What you will see in a repair shop is heavy duty and will CHUG along for a long time. If you look at one and it goes WHAAAAA it is over rated and needs to go that fast to do it's stuff. Cast iron oil bath pump. You will never go wrong with an EMglo if you can find a good used one. I have two and LOVE them. Jeffcat

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135 Fan

11-15-2006 16:33:54




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 Re: Compressor size and power? in reply to jeffcat, 11-15-2006 16:09:34  
The best compressors have a 1720 rpm motor instead of a 3450 rpm motor. It adds a lot to compressor life. Dave



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SteveinCT

11-15-2006 12:50:53




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
We don't have auctions around here too often, but we do have pawn shops. The one I go to has a Campbell 30 gallon 4 horse for $150, but it's been rode hard. I passed up a Sears for $250 that was mint. You might give one a try.



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chvet73

11-15-2006 07:49:18




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
Do not buy oiless.
Do not buy less than a 20 gallon tank.

With that said, you can find one for your budget on EBay, The Recycler or Craig's list.

I just sold one like that, a 220V model, on Ebay and bought a similar 110V on Ebay.

They are not hard to find.

I grant a 60 gallon is ideal, but at your budget which was like mine a 20 gallon will work and they are available.



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lucasss

11-15-2006 05:32:03




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
i got a 20 gallon 2 cyl 2hp sears that will run a paint gun all day with a regulator. . and of course a blow nozzle. max pressure is 125 pounds.it wont run a 1/2 impact long though. lucas



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kopeck

11-14-2006 15:56:06




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
Just my two cents...

Bigger is better, so get the best your budget can afford. I have a Sears 60 gal. 2.9 HP job that does what I want. I wish it was an oil bath compressor but I just couldn't afford it. I figure if it kicks the bucket I'll just replace the pump with a better one some day.

Anyway don't go to cheap, you will regret it, trust me.

K

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buickanddeere

11-14-2006 14:42:43




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
Be wary of HP ratings and size via cfm at 90psi instead. As prevously stated a vertical tank and the absolute very least a true 3HP machine.5HP is really the minimum if painting, running a small sand blaster, filling a large tire etc. 240V, the 120V machines are ok for hobby use or filling bicycle tires. The odd time a real deal shows up at auction sales, usually at a sale I missed attending.

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135 Fan

11-14-2006 18:04:26




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 Re: Compressor size and power? in reply to buickanddeere, 11-14-2006 14:42:43  
The worst thing is when everything else is selling cheap and the one thing, you waited around all day for, is what everybody else wants. It never fails! You think you're going to get it real cheap and all of sudden 5 guys come out of the wood work and bid it up. Or the auctioneer spends ten minutes trying to get a higher bid because he thinks you should pay more. I've got a couple deals at auctions but not very often. Of course like you mentioned, if you didn't go to the sale, everybody keeps telling you the great deal you missed. Sigh. Dave

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CNKS

11-14-2006 14:38:52




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
$200 isn't going to cut it. For what you want to do, that is use air tools, you need a minimum 60 gal tank, 15 cfm @ 90 psi, about $800 -- and that's minimum, you will wish you had a bigger one.



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Midwest redneck

11-14-2006 14:02:47




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
For a small home usage get a 1.5 hp 10 gallon or so tank 110VAC. If you want to run more then one thing at a time then get a 220V 30gallon. My 2 cents.



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supergrumpy

11-14-2006 13:04:17




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
I'm wrestling with same issue right now

I was told to start with the air tools I plan to run, calculate CFM required and all that stuff and THEN go looking at compressors



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glennster

11-14-2006 10:54:43




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
depends on your budget. i would get at least a 60 gallon vertical,(saves floor space) 5 hp 220v. a two stage compresser pump is also a good thing, gives you a higher working pressure. farm and fleet home depot or big r's run anywhere from 600 to 2000.00 for a decent compressor. i have a 7.5 hp 120gal champion, a 10 hp champion 120gal,, 220v, and also a 10hp cambell and a 7.5 snap on 3 phase. the snap on is louder than heck, the champions and the cambell are fairly quiet. 3phase are cheaper

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Mike CA

11-14-2006 11:18:02




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 Re: Compressor size and power? in reply to glennster, 11-14-2006 10:54:43  
My budget is around $200. I would say that $600 - $2000 is quite out of the question.

I'll keep my eyes open for used stuff.



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135 Fan

11-14-2006 12:03:18




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 11:18:02  
You're probably not going to find much of a compressor for $200. However, look for a cast iron compressor with oil lubrication and try it out. Make sure you can still get parts for it. Dave



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glennster

11-14-2006 11:47:42




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 11:18:02  
watch sears for sales, they have a 30 gallon either upright or horizontal roll around for around 250-300. they are 110 volt 20 amp draw. they pump 125psi, which should be enought to get you by.



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Glenn F.

11-14-2006 09:53:33




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
If you have a small tank I would have a secondary tank along side with a shut off valve in between. When working in the shop all day and you anticipate heavy compressor use, open up the valve to the other tank(60 gallon or so). This will make a small compressor seem like a big one...assuming the compressor duty cycle is up to the task.

Glenn F.



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old

11-14-2006 09:05:13




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 08:35:42  
The biggest set up you can afford. You can never have one to big but you can have one to small. The larger the CFM the better also. As far as engine I'm guessing your talking about a gas power unit instead of an eletic one. If so you can figure it takes 2 or 3 gas HP to match 1 HP of zap-u-trons.

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Mike CA

11-14-2006 09:50:31




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 Re: Compressor size and power? in reply to old, 11-14-2006 09:05:13  
Actually, since it will be in my garage, I will be getting an electric motor.



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old

11-14-2006 11:19:35




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 Re: Compressor size and power? in reply to Mike CA, 11-14-2006 09:50:31  
Still the biggest tank you can get and the most CFM and you will not regret it. I have a big old shop compressor and at times its still not enough CFM for what I do. Also the lager then tank the less it will run between full to turn on points



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